Patent US2721839A successfully refreshed from Google Patents.
US3527010A
Expired / Lapsed
US
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Building wall construction
Assignee: Cyprus Amax Minerals Co
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Filing: 1968-05-20
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Granted: 1970-09-08
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Expires: 1988-05-20
Abstract
Abstract There is provided an improved building wall construction including a thermal expansion type split mullion. The mullion includes a continuous face member against which opposed panels are glazed with glazing tape as the seam end weathering. This eliminates the seam between the mullion halves from the exterior face of the mullion assembly altogether, protecting the seam from the weather, and reducing the vulnerable sealing lines exposed to the weather.
Inventors
- 👤 Kazimierz J Brzezinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:04
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/54; E06B3/58; E06B3/5807; E06B3/5821; E04; E04B; E04B2/00; E04B2/88; E04B2/96; E04B2/967
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |